Jack



Aug. -14, 1923.

M. D. RIKER JACK Filed March 25 HWK? a f Patented ug. 1d, 19.

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application med March 25, w20. Serial No. tll.

To all fwwm t may concern.'

Be it known that I, MALCOLM D. Rime, a citizen of the United States ofAmerica, and a resident of Dover, county of Morris, and State of N ewJersey, have invented certain new and useful lm rovements in dacks, ofwhich the following 1s a specication.

rlhe obects of the present invention are to provi e a lifting jack ofparticularly light, compact, simple and oweriul construction andespecially suite to automobile needs.

The invention involves a number of novel. features of construction,combinations and arrangements of parts, as will be hereinafter disclosedin detail.

In the drawing accompanying and torming a part of this specification,have illustrated the invention embodied Vin one of its simple, practicalforms, but wish it under-- stood that the structure may bemodifiedwithout departure from the true spirit and scope of the invention.

1n the drawing referred to, Figure 1 is a vertical sectional view of thecomplete jack.

Figure 2 is a view looki at the right hand side of Figure 1, withportions of the jack broken away and shownv in section.

Figure 3 is a horizontal sectional view taken on substantially the planeof line 3 3 of Figure 1.

Figure 4 is another horizontal sectional view taken on substantially theplane of .line lr-4c of Figure 2.

One of the special features of the invention is the making of thesupporting post and the extensible sleeve or column of two sections ofcommercial cylindrical tubing cut to the proper length and arranged toslide, one over the other. The inner section of tubing, whichconstitutes the tubular supporting post is designated 5 and thesurrounding sleeve is designated 6. The supporting post is provided witha suitable base, such as 1 have indicated at 7 and to which the ost isshown as secured by means ci a wel ed joint 8. The sleeve isnon-rotatably but slidably e aged on the post by indenting op osite si eportions at the lower en d thereoii; as indicated at 9, to provideflattened parts sliding over oppositely indented flattened side rtions10 oi' the post which extend throng out the length thereof.

'.lhe sleeve carries the lifting head 11, which 1s shown as set in theupper end of the sleeve and secured thereto oy the welded. Joint at 12.The sleeve may also be provided wlth an outstanding foot or step 13 forengagement beneath relatively low objects, or 1n glaces where thelifting head cannot be use v The sleeve is operated by a. screw 1d hav-1n a'bearing in the nut 15.

1s nut 1s supported in the upper end or the tubular post and is shown asnonrotatably engaged .therein by having the radial webs. 16 engaging inthe top of the post and bearing against the cylindrical inner surfacesof the post at op osite sides of the iiattened portions thereo (1F ig.3). Thie nut furthermore is shown as tixedly secured 1n the end of theost by means of a portion 17 of the wall cio the post indented into apocket .18 formed in one of the webs et the nut, sald wall bein thusindented over the shoulder provided the pocket in the nut by means of asuitab e tool inserted through an opening 19 provided in the outersleeve.

The screw has a rotating connection with thehead and is also providedwith means by which it may be turned one way or the other. The meansillustrated for this purpose cornprises a bevel pinion 20 which maybeformed intefgral with tl sew and which is shown as orm'ing a s ou erenga the under side of the supporting headgmdgn anti-friction washer 2lmay 'e interposed between the shoulder thus provided and the under `sideof the head and the screw is shown as formed with a spindle extension 22bearing ln adsocket provided in the under side oi the rllhe drivingmeans for the screw is shown in the form et an operating shaft 23carrying a bevel gear 24: at its inner end engaging the ear on thescrew.

' 'll e oeratin shaft is shown as journaled in a bus ing 25 aving areduced cylindrical extension 26 seated in the o ening provided in thewall et the sleeve an an outstanding annular Bange 27 overlyin the4outer :tace of the sleeve and secured t ereto by means of a weldedjoint 28.

rlihe construction disclosed, while relatively light and simple, is verypowerful and is small and compact so that it y easily tid Sii

be carried and handled. A articular feature is the ease with which t edevice may be made up and assembled.. The tubular ost is secured to itsbase and the supporting head is secured in the upper end of the sleeve.The under surface of the suiptporting head need not be faced off until aer it is secured in the sleeve. This insuresthe provision of a tr'uebearing surface for the shouldered portion of the lifting screw. Afterthespindle at the upper end of the screw is engaged in its seat the gear24 is positioned and. engaged on the inner end of the operatin shaft,which end may be squared or ot erwise shaped to key the gear thereon,the gear being held in position, for instance, by means of a set screw29.

Provision is made for entering the nut within the sleeve by forming itwith recessed or Iiattened portions 30 at opposite sides thereof, saidrecees being of such a depth as to pass the indented or attened portionsat the lower end of the sleeve. After being thus entered in the sleeve,the nut is turned, substantially at right a les in this instance, tobring the outstan webs thereof into position to stand at o posite sidesof the flattened portions of t e post, whereupon the nut can be properlyseated in the end ofthe ost. In this assembled position, it will seenthat the iiattened portions 30 of the nut are out of line with theindented portions of the sleeve and that the remaining portions of thenut which, as shown inFi l e 3, are cylindrical, will overstand the inented portions of the sleeve and form a bearing for the sleeve in itsslidin movements over the post. These overstan g c lindrical portions,therefore provide stops ger limiting the rejection o the sleeve over thepost and t e anchoring of the nut by the means described positivelyprevents the separation of the sleeve from the ost.

at I claim is:

1. In a jack, the combination with a tubular post having an elongatedindented por.` tion, a tubular sleeve slidably engeaed over the post andhaving a short inden portion slidably engaging the indented portion of.the post, a nut supported by the post and having a reduced portionmovable past the indented part of the sleeve, means for 'securing thenut to the post with said reduced portion out of line with theindentation of the sleeve, a screw engaged with the nut and connectedwith the sleeve and means for operating said screw.

2. In a jack, a tubular post, a sleeve slidably engaged over'the post,said poet .and sleeve having portions of reduced diameter slidablyengaging to prevent rotation of the sleeve on t e post, a screwconnected-with thesleeve, a nut .for said screw supported y by the postand having a portion of sifscienuy reduiaismer te pass the re.

duced portion of the sleeve and said nut having a part received in theand enwith the portion of lesser diameter to o d e nut wit the reducedportion .thereof out of line with the reduced portion of the sleeve. Y

3. In a jack, a tubular post, a sleeve slidably engaged over the post,said post and sleeve having rtions of reduced diameter slidably engagingto prevent rotation of the sleeve on t e post, a screw connected withthe sleeve, a nut for said screw supported by the post and having aportion of suiciently reduced diameter to pass the reduced portion ofthe sleeve and said nut having a part received in the post and engagii Ywith the rtion of lesser diameter 'to the nut with the reduced portionthereof out of line with the reduced portion of the sleeve and means forsecuring the nut inV auch 'tion. l y

4. a jack, a tubular post, a sleeve slidably engaged over the post, saidpost and sleeve having portions of reduced diameter slidably e g toprevent rotation ofthe sleeve on t e post, a screw connected with thesleeve, a nut for said screw supported by the post and having a portionof suliiciently reduced diameter to pass the reduced portion of thesleeve and said nut having a part -received in the post and engaging`with the portion of lesser diameter to hold the nut with the reducedportion thereof out of line with the reduced portion of the sleeve andmeans for securing the nut in such position gilt com risin a portion ofthe wall ofh the in en into engagement wit a shoulder on the nut.

5. In a jack, a tubular post, a sleeve slidably engaged over the' post,said post and sleeve having ortions of reduced diameter slidablyengaging to prevent rotation of the sleeve on t e post, a screwconnected with the sleeve, a nut for said screw supported by the postand having a portion of suiciently reduced diameter to pass the reducedportion of the sleeve and said nut having a part received in the postand vengagin with the portion of lesser diameter to lio d the nut withthe reduced portion thereof out of line with the reduced portion of thesleeve and means for securing the nut in such position and compr' aportion of the wall of the t indente into engagement with a shoul er onthe nut, the sleeve having an opening therein providing access for atool for thus mdenting the post into engagement with the nut. l

6. Ina Jack, a tubular post havin ilattened sldesha sleeve slidablyengage over thel -said sleeve having short indented portions near oneendvarranged to cooperate .with the ilattened sides of the post, alifting head aixed to the other end of the sleeve, a screw connectedwith the sleeve, in the ost and engaging with the fiattened and a nutfor the screw, said nut having a sides t ereof to hold the nut with itsfiatpart of greater diameter than the inside. tened portions out of linewith the indented 1U diameter of the post, adapted to rest on portionsof the sleeve.

5 the top of the post, Opposite portions of said In Witnese whereof,have hereunto set post being flattened to clear the indented my hand,thls 23rd day 0f March 1920- portions of the sleeve, and a part receivedMALCOLM D. BIKER.

